What's Next for Low-Dimensional Materials?

Dresselhaus, M. S.

doi:10.1080/21663831.2013.838194

Cited by 6 publications

(2 citation statements)

References 96 publications

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“…It seems that the above examples concerning graphene-coated NPs and graphenes modified by NPs may be considered as a supplement to the wide field of graphene applications [ 117 – 122 ].…”

Section: Hybrids Of Cationic Porphyrins With Graphenementioning

confidence: 99%

Hybrids of cationic porphyrins with nanocarbons

Girek

Śliwa

2015

J Incl Phenom Macrocycl Chem

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“…It seems that the above examples concerning graphene-coated NPs and graphenes modified by NPs may be considered as a supplement to the wide field of graphene applications [ 117 – 122 ].…”

Section: Hybrids Of Cationic Porphyrins With Graphenementioning

confidence: 99%

Hybrids of cationic porphyrins with nanocarbons

Girek

Śliwa

2015

J Incl Phenom Macrocycl Chem

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“…Bilayer graphene is another prototypical system for two-dimensional few-layer materials that show unusual properties with promising applications in organic electronics. − A graphene layer consists of sp 2 carbon atoms whose electronic properties originate from the structure of the energy levels near the Fermi energy. − These properties can be effectively modulated both by size quantization effects (e.g., by cutting, bending, and folding) and by layer stacking. In bilayer graphene, different stacking orders may occur: the most stable is the AB (Bernal) stacking, although the less common AA-stacking has also been reported (including in graphite).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Electronic Coupling in Solids from Ab Initio Periodic Boundary Condition Calculations: The Case of Pentacene Crystal and Bilayer Graphene

Biancardi

Caricato

2016

J. Phys. Chem. C

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Understanding the modulation of the electronic coupling in molecular crystals and two-dimensional materials is crucial from a fundamental point of view as well as for the development of organic electronics. In this work, we present a first-principles quantum-mechanical method for the calculation of the electronic coupling (or transfer integrals) between fragments or layers, using density functional theory with periodic boundary conditions (DFT-PBC) within the Γ-point approximation. This method is applied to two periodic systems: crystalline pentacene and a bilayer graphene film. For the former system, we find that the inclusion of the solid environment affects the interfragment electronic couplings, with changes of the order of 10%. However, we confirm the qualitative trends obtained with the "isolated molecular dimer" model. For the graphene film, we show how the interlayer coupling changes with the relative position of two π-stacked layers. Interestingly, we find that particle−particle coupling is large even for configurations that are not perfectly stacked.

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Aligned van der Waals Coupled Growth of Carbon Nanotubes to Hexagonal Boron Nitride

Nasseri

Ansary

Boland

et al. 2018

Adv Materials Inter

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underlying lattices, having less than a 2% lattice mismatch. [21] Specifically, combining nanotubes and 2D layers of these two different materials could allow for very different shapes of these constituents to be interfaced while still maintaining nearly the same underlying lattice motif. This could help achieve one of the fascinating aspects of toy lego construction, where very different shapes are snapped together using a common underlying lattice motif. Moreover, recent theory [22] and experiments [23,24] show that hBN could be an excellent substrate for increasing the performance of CNT devices. The integrated growth of mixed low-dimensional materials with different dimensionalities could represent an attractive avenue for precisely obtaining these potentially useful integrated systems. For the case of all 2D interfacial systems, the growth of graphene on layered hBN that has developed over the last several years [25][26][27][28][29][30][31][32][33][34][35] has progressed to the point where epitaxially grown systems [35,36] rival the performance of interfaces fabricated through mechanical transfer. [37] The development in growth of dissimilar low-dimensional systems with mixed dimensionality could likewise greatly improve the reliability and ease with which to precisely synthesize these integrated systems. Moreover, the integrated growth with mixed dimensionality could provide avenues of achieving systems that are not possible through exfoliation and transfer-techniques that are generally restricted to layered 2D materials.Here, we show the aligned growth of 1D CNTs on layered hBN substrates. Raman scattering, scanning probe, and nanomanipulation experiments indicate that CNTs are grown on the surface of the hBN under van der Waals (vdW) interactions and are preferentially aligned along certain crystal directions. Furthermore, electrostatic force microscopy (EFM) measurements and local nanoscale transport measurements show that the CNTs conduct electrical current, in contrast to the surrounding insulating hBN substrate. These results represent an aligned growth of vdW-coupled dissimilar materials having different dimensionalities, which provides a possible avenue to achieve oriented nanoscale circuitry on a high-quality insulating hBN substrate. Results and DiscussionTo grow the aligned CNTs we begin by depositing Ni catalyst onto clean exfoliated hBN flakes placed on SiO 2 substrates (see the Experimental Section for details). Using a 1 in. tube-furnace 1D carbon nanotubes (CNTs) are grown on hexagonal boron nitride (hBN) surfaces. The nanotubes show clear preference to align to specific crystal directions of the hBN substrate. Raman spectra confirm that the nanotubes consist of sp 2 carbon, while nanomanipulation shows that they are van der Waals coupled to the underlying hBN substrate. Scanning conductance and electric force microscopy show that the CNTs have significantly greater electrical conductance compared to the hBN. This integrated aligned growth of materials with similar lattices, yet having dissi...

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What's Next for Low-Dimensional Materials?

Cited by 6 publications

References 96 publications

Hybrids of cationic porphyrins with nanocarbons

Hybrids of cationic porphyrins with nanocarbons

Evaluation of Electronic Coupling in Solids from Ab Initio Periodic Boundary Condition Calculations: The Case of Pentacene Crystal and Bilayer Graphene

Aligned van der Waals Coupled Growth of Carbon Nanotubes to Hexagonal Boron Nitride

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